454 TRANS. OF THE ACAD. OP SCIENCE. 



stamens as long as the ovary, so that the style, which is of 

 the same length, protrudes beyond them; seeds 0.25-0.27 

 line long, oblanceolate and acute, or, in the Fort Whipple 

 specimens, obovate and upwards obtuse ; these specimens are 

 also distinguished by the absence of all traces of stolons, and 

 by the slightly roughened surface of the upper part of the 

 stem. — From the closely allied J. falcatus our plant is dis- 

 tinguished by the greater size, the paniculate heads, the 

 shape, proportion, and surface of the sepals, and the shape of 

 the seeds. 



30. J. leptocaums, Torrey & Gray in Herb. Durand : 

 caulibus csespitosis erectis (spithameis pedalibus) gracilibus 

 compressiusculis fistulosis paucifoliis ; foliis planis caule brevi- 

 oribus ; capitulis singulis seu paucis (1-3) spatham fere aequan- 

 tibus 3-6-floris ; bracteis ovatis aristatis flore subpedicellato 

 plerumque brevioribus ; sepalis ovato-lanceolatis acuininato- 

 aristatis requalibus seu exterioribus paulo brevioribus stamina 

 3-6 et capsulam obovatam tricoccam retusam mucronatam 

 trilocularetn quarta parte superantibus ; antheris oblongo 

 linearibus filamento bis terve brevioribus; stigmatibus ovari- 

 um obovatum cum stylo perbrevi asquantibus inclusis ; serni- 

 nibus obovatis apiculatis costato-lineolatis. — J. fillpendulus, 

 Buckley in Proc. Acad. Phil. 1862, p. 8. 



Arkansas, Herb. Durand, Western Texas, Lindheimer, 

 Wright, Buckley. — Whole plant light green ; gracile stems 

 6 or 8 to 12 and 14 inches high, growing in dense tufts from 

 very small but apparently perennial rhizomas ; heads single 

 or, rarely, two or three, the secondary ones pedunculate and 

 overtopping the primary one, in fruit 4-5 lines in diameter, 

 consisting of 3-6 or 7 light green flowers ; flowers not quite 

 1h lines long, remarkable for the elongated sharp points of 

 the inner as well as the outer sepals, and for the irregular 

 number of stamens; stamens sometimes 3, often 4 or 5, rarely 

 6, some of the inner ones commonly depauperate, with very 

 slender filaments and extremely small anthers ; seeds very 

 similar to those of the next species, 0.22 line long, with about 

 6 strong and dark ribs visible on one side. 



I had to change the only published name of this species, 

 J. fiUpendulus, because it is absolutely wrong, the fibrous 

 rootlets bearing no tubers at all ; intending to substitute the 

 name of the author and call it J. BucJcleyi (p. 435), I dis- 

 covered, from a label in Mr. Durand's herbarium, that Torrey 

 and Gray had already named the species, I therefore adopt 

 their very appropriate designation. 



31. J. marginatus, Rostk. Mon. June. 38, t. 2, f. 2 ; a well 

 known species which grows all over the eastern and interior 

 States, and down to Texas as far as woodlands extend, but 

 has not been found in the western plains or mountains. It is 



